My car has a minor crack as well, barely pushed in... roughly the size of a postage stamp. Nothing crucial, but I'm going to stay vigilant and try to scoop up a NOS/takeoff speaker grille... As small as the crack is though, I'm going to try to simply glue/epoxy the edges and push it back out flush. If it seals properly, it should relatively undetectable. Even as-is, it's very hard to detect.